germ ring

germ ring
the thickened margin of the blastodisc that advances over the yolk during epiboly

Dictionary of ichthyology. 2009.

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  • germ ring — the proliferating marginal zone of the early blastoderm that is about to become the lips of the blastopore …   Medical dictionary

  • ring — RING, ringuri, s.n. 1. Estradă ridicată la o înălţime regulamentară, de formă pătrată şi împrejmuită cu corzi sprijinite pe patru stâlpi, unde se dispută gale de box. ♦ p. ext. Box. ♦ Platformă, estradă sau spaţiu special amenajat într un local,… …   Dicționar Român

  • Ring — Windung; Kringel; Kreis; Reif * * * Ring [rɪŋ], der; [e]s, e: 1. gleichmäßig runder, kreisförmig in sich geschlossener Gegenstand: einen goldenen Ring am Finger tragen. Zus.: Armring, Dichtungsring, Fingerring, Fußring, Gardinenring, Goldring,… …   Universal-Lexikon

  • þring- — *þring germ., Verb: Verweis: s. *þrenhan s. þreng ?; …   Germanisches Wörterbuch

  • ring — {{hw}}{{ring}}{{/hw}}1 Nel pugilato, quadrato. 2 (econ.) Accordo fra imprese per incettare una materia prima o un prodotto. 3 Filatoio continuo, nel quale il filo riceve la torsione passando attraverso un anello, trascinato per attrito dal fuso… …   Enciclopedia di italiano

  • Local ring — In abstract algebra, more particularly in ring theory, local rings are certain rings that are comparatively simple, and serve to describe what is called local behaviour , in the sense of functions defined on varieties or manifolds, or of… …   Wikipedia

  • gering — klein; marginal; kaum; wenig; winzig; mickerig (umgangssprachlich); dünn (umgangssprachlich); mickrig (umgangssprachlich); unbedeutend; …   Universal-Lexikon

  • blastopore — a circular area on the yolk of Teleostei eggs not covered by the advancing germ ring during epiboly …   Dictionary of ichthyology

  • embryonic shield — a thickened arm of the germ ring representing the future longitudinal axis of the embryo …   Dictionary of ichthyology

  • involution — deep cell movement at the blastoderm margin in which the deep cell layer folds inwards and back on itself producing the germ ring and its two primary layers, the epiblast and hypoblast …   Dictionary of ichthyology

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